William a



Patented Oct. 28, 1919.

19M- BENEWED SEPT. 16| l9l9.

w. Al SMITH. Damme Awaluus.

4 IFPLICATEON FILED AUG.29. 1,319,975.

N HV,

I l :1E mf Y UNITED STATES PATENT OFFICE.

WILLiAM' sum, or nmivsn, coLomwo, assronon'ro THE DENvE-nnoci: DRILL manor-creams comrm, or nENvEn, comma, a conromrmn or DELA.

nniLLINe APPARATUS.

specimens of Leners raient.

Original application led. September 26, 1914, Serial No. 833,644. Divided and this application tiled YAng-n 29, 1916, ISerial lfm-117,483. Benewedlseptemlier 16, 1.919.v Serial No. 324,216.

To all whom it may concern: 4

v' Be it known that I, Winnaar A. $111111, a citizen of the United States, residin at Denver, in the county 'of D'eni'e'r and tate of Colorado, have invented certain new and useful' Improvements in DrilliiigA paratus,

of which the following is a' s eci cation.

i The present invention re ates to' rock drilling apfparatus, and this a plioation is a' application Seria No. 833,644,"

division o r filed September-26, 1914.

One of the objects of the invention is to provide novel and effective 'means for delivering a cleansing agentto the bore 'oli/a.v ose of removr1 lV 1101s, and.

hollow"`drill bit for the pur' ing the cuttings from 'tie while particularly intended for drilling' nppai'atus of the so-calledpnlsator type, mf

provided with a passageway 22 there VSimilar reference numerals designate cor-V responding partsiii all the figures ofthe drawings.

In the'einbodiinent disclosed, portions of a compressor and a motor are illustrated,

the compressor including a cylinder memberV .v 1 containing n piston 2, to `which 1s attached a piston rod V3 projecting from .the cylinder member and connected to suitable Aoperating mechanism, not shown.

The drilling.` motor comprises ii'cylinder' member 4. wit-hin whiclris located nfl-ee hammer piston 5 that Aisdriuen back and forth by the airalternately compressed on opposite sides of the piston 2 during its i'eciprocation. This air passes fronithe compressor cylinder 1 to the motor cylinder 4 on opposite sides of the piston 5, through passages 6 and 7, the passage 7. having a front' poi-t8 and a rear port 9 that is in the forni of a' circular groove in the inner face oa rear headbushmg 10. Relief channels 11 are'cgnnected with the vsaid passages and portsff .V

The rear .port 9 is controlled by a forwardly opening valve 12 lnolinted o n a spindie 13' secnrcd in the bushing lby a nut 1i which projects throu h said bushing. Y. This valve constitutes in e ect a check valve, and

ner end. lhe front 'end of the spindle 1 3 Patented Oct. 2S, 191 9.

has an outstandin flange 17, and a coiled spi-ing 18 surnonn ing thc spindle and in;

tei-'posed between .the ianges 16, and 17. i

serres to urge the valve to clbsed positi'o'i i. n The front end ofthe motor cylinder member 4 is provided with a head bushing, a

to detacliably receive K,the rear end Yoffa. tool portion' of which is shown at 1'9, and saidvl ushing' contains a rotatable drill holding' ,A Vchuck 20. Said chuck has a socket arranged 21, said tool bcingrotat'able with the chuck L in a in anncr well understood. 'Ihis tool is ai' ose of delivering through for the ottoni of the drill cleansing fluid to 't ie .'hole. A tappi-.t 23 is slidablrm'ounted in thc head, its inner cud projecting inte the '21. 4Invordcr'tliat the ,abutting faces of the' c i'linderi'neinbcr 4 in a position to be struck tappet anddrllbit may also he in proper contact ,to obvialo leakage of thc cleansing.,

- fluid. a coiledspring;r 24 may be arranged Ato abut against the flanged frontend 25 of thc A tappet to urge the same forwardly.

For the. purpose of delivering` cleansing iiuid to the bore 220i the drill bit.- a tube extends longitudinally and wntrally through the cylinder 4, through the piston 5 and into the tappet 23, terminating short of the front end o mounted in the rear head 26 o .the cylinder member 4. Said rear end is-securcd and the said tappet. this tube also extending e. throughl a cent-ral bore formed in the valveV supporting Stem 13, andv havin its rear end cuid into the bore 22 gf the en CUN struction may be Thefcleans'ing agent, preferably water, is thus delivered to the drillv bitthrough the tube and tappet 23 which directs such a relatively tight joint bein'g maintained between the tappet and the rear end of the drill bit by the sprl 24, s othat there is little leakage at the joint between the tubes.

From the foregoing, it is thought that the -`i'aoiistruction,f operation'. and many advantages of the herein described invention will .be apparent to those skilled in the art withwith a mptor comprising a cylinder member therein, of., means anda piston Operating tive fluid to the piston to for delivenn mo it in uding arear passage openinf;

von by the iston, and means exten ing tbroughfthe vV lveior delivering cleansing V 2. InV apparatus, the combination with a motor compris a cylinder member and a piston ope'mting'g' delivering motive Huid to the piston to actuateitincluding a rear 4 opening i `into the cylinder liiigzimcli ==-s= a hollow tool to be op,-v .eratedjon y the piston, and means for dethe'cylinder member,-

member, a .valve controlcl 'fluid tothe tool including a`. 'tube exten through the valve and piston.

3.1nnri1iin'g tppmws, ne' combination i with a'motor comprising a cylinder member and a p iston operatln A therein, of .means for 4 deliv motive ilui to the piston to actug it inisluding areal' opening into a valve controlli a. Vstein on which thefvalve is hollow tool tocbe operated on by and means for delivering cleansing u'idto the tool including a tube en gaged .in the stem.

through 4the head and. `ushiiig the cylinder member, a .valve contro such passage, a hollow" tool to be o 1'-,-

4. In drilling apparatus, the combination with a motor comprising a cylinder member and a piston o ing therein, of means for delivering motive iiuid to the pistonto actuate it including a rear opening. into the cylinder member, a orwardly projecting stem and having a bore therethrough, a controlling valve .mounted on the stem, a.V spring interposed between the spindle and valve for normally lioldi said, valve closed, a rearhead for the cy inder member, and a.tube mounted in the rear head and extending through the piston. v 5,'In drilling apparatus,.the'combination with a cylinder member having a head. and. a bushing arranged-at the inner side of the of a piston operating in the cylinder inem r, means for supplying motive duid to the cylinder member throu h'the hushing, and means for sup lying c causing 'uid to a tool operated on by the piston.

6'. In drilling apparatus, the combination with a cylinder member having a head 'and a bushing V head of a piston operating in the cylinder m' means en fory supplying motive VVfluid to the cylinder member, and a tube mount/eden the head and passing through the bushing and piston t0 4deliver cleansing Huid to a tool operated on by the piston.

with the bushing arranged at the inner side 1of the 7. in driinng apparatus, un wmtimion with a cylinder member, of a p iston'operating therein, a tube for supplying cleansing fluid to a tool operated on by the piston, and means surrounding the tube for controlling the llow of motive [luid supplied the cylinder member for actuating said piston.-

` 8. In drilling apparatus, the 'combination with a c linder member, of apiston therein, a tube Aor supplying cleansing lluid' to a tool operated on by the piston, and a vcheck valve surrounding the tube for controlling the llow of motive ud tothecylinder member for actuating said piston.

In testimony whereof I ailix my signature in the presence of two witn WILLIAM A. SMITH. Witn: 

